sounds like that might be waht it is. i went to remove mine and the yellow clip wasnt secure and mine almost few off. it slid back and i stopped to get gas and noticed it. the next day i removed my rails all together and then installed cf caps.
2005 Base Vibe W/ moon and tunes , piaa headlight/foglight bulbs, tein s-tech suspension, cosmo CAI, TRD quickshifter, ES motor mount bushings, magnaflow exhaust, RK sport CF roof rack caps, tinted windows, kenwood KDC-X589 HU/w remote Cardomain Page http://www.cardomain.com/ride/797307